Flavoring with alkyl-substituted cyclohexyl and cyclohexenyl carboxylic
申请人:Givaudan Corporation
公开号:US04606925A1
公开(公告)日:1986-08-19
The present invention discloses fragrance and flavor compositions comprising 4-alkyl substituted cyclohexyl and cyclohex-3-enyl carboxylic acids wherein the 4-alkyl substituent is an ethyl, propyl or butyl group, and methods for preparing same.
Substrate Specific Silver(I)-Catalyzed Cycloisomerization of Diene Involving Alkyl Rearrangements: Syntheses of 1,2,5,6-Tetrahydrocuminic Acid, <i>p</i>-Menth-3-en-7-ol, and <i>p</i>-Menth-3-en-7-al
The novel cationic Ag(I)-catalyzed cycloisomerization, which is associated with alkyl rearrangements, from dimethyl 2-allyl-2-prenylmalonate (1) to dimethyl 4-isopropylcyclohex-3-ene-1,1-dicarboxylate (2) has been developed. Derivatization from the diester 2 into the diol 3 and its X-ray crystallographic analysis determined the structure. The mechanisms of the novel reaction were investigated by isotopic